Loans Loans - Weighted Average Risk Grade for All Commercial Loans by Class and Year of Origination (Details) $ in Thousands	Sep. 30, 2022 USD ($) Grade	Dec. 31, 2021 USD ($) Grade
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net of Deferred Income	$ 16,950,629	$ 16,336,397
Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	1,251,173
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	739,635
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	544,428
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	261,580
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	152,945
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	211,871
Financing Receivable, Revolving	2,305,283
Loans and Leases Receivable, Net of Deferred Income	$ 5,531,820	$ 5,364,954
Weighted Average Risk Grade For Loans | Grade	6.41	6.22
Commercial and Industrial Total Energy Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 335,500
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	105,443
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	5,728
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	11,366
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	4,235
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	4,297
Financing Receivable, Revolving	404,598
Loans and Leases Receivable, Net of Deferred Income	$ 918,125	$ 1,077,792
Weighted Average Risk Grade For Loans | Grade	5.86	6.06
Commercial Real Estate Buildings Land And Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 1,533,485
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	1,608,671
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	1,061,879
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	860,710
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	422,630
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	969,306
Financing Receivable, Revolving	109,368
Loans and Leases Receivable, Net of Deferred Income	$ 6,673,927	$ 6,272,339
Weighted Average Risk Grade For Loans | Grade	7.14	7.22
Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 504,958
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	571,022
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	164,362
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	49,302
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	490
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1,762
Financing Receivable, Revolving	261,105
Loans and Leases Receivable, Net of Deferred Income	$ 1,557,415	$ 1,304,271
Weighted Average Risk Grade For Loans | Grade	6.99	7.06
Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 2,038,443
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	2,179,693
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	1,226,241
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	910,012
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	423,120
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	971,068
Financing Receivable, Revolving	370,473
Loans and Leases Receivable, Net of Deferred Income	$ 8,231,342	$ 7,576,610
Weighted Average Risk Grade For Loans | Grade	7.11	7.19
Risk Grade One To Eight [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 1,214,942
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	706,035
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	529,894
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	242,581
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	136,161
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	199,629
Financing Receivable, Revolving	2,180,437
Loans and Leases Receivable, Net of Deferred Income	$ 5,256,767	$ 5,063,847
Weighted Average Risk Grade For Loans | Grade	6.25	6.01
Risk Grade One To Eight [Member] | Commercial and Industrial Total Energy Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 319,910
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	105,110
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	5,238
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	5,674
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	2,346
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	4,146
Financing Receivable, Revolving	386,836
Loans and Leases Receivable, Net of Deferred Income	$ 874,383	$ 1,008,370
Weighted Average Risk Grade For Loans | Grade	5.61	5.78
Risk Grade One To Eight [Member] | Commercial Real Estate Buildings Land And Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 1,434,936
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	1,556,836
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	936,889
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	731,589
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	361,215
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	868,933
Financing Receivable, Revolving	101,817
Loans and Leases Receivable, Net of Deferred Income	$ 6,097,383	$ 5,574,922
Weighted Average Risk Grade For Loans | Grade	6.91	6.91
Risk Grade One To Eight [Member] | Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 464,837
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	568,694
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	162,262
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	35,986
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	490
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1,762
Financing Receivable, Revolving	243,723
Loans and Leases Receivable, Net of Deferred Income	$ 1,482,168	$ 1,262,200
Weighted Average Risk Grade For Loans | Grade	6.85	6.99
Risk Grade One To Eight [Member] | Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net of Deferred Income		$ 6,837,122
Weighted Average Risk Grade For Loans | Grade		6.92
Risk Grade Nine [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 34,065
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	28,895
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	6,211
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	6,909
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	12,436
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	9,923
Financing Receivable, Revolving	94,984
Loans and Leases Receivable, Net of Deferred Income	$ 204,556	$ 187,870
Weighted Average Risk Grade For Loans | Grade	9.00	9.00
Risk Grade Nine [Member] | Commercial and Industrial Total Energy Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 1,722
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	147
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	245
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	659
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	829
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0
Financing Receivable, Revolving	10,016
Loans and Leases Receivable, Net of Deferred Income	$ 13,653	$ 36,622
Weighted Average Risk Grade For Loans | Grade	9.00	9.00
Risk Grade Nine [Member] | Commercial Real Estate Buildings Land And Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 51,425
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	20,259
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	109,106
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	79,833
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	24,749
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	54,595
Financing Receivable, Revolving	4,558
Loans and Leases Receivable, Net of Deferred Income	$ 346,659	$ 321,533
Weighted Average Risk Grade For Loans | Grade	9.00	9.00
Risk Grade Nine [Member] | Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 11,270
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	2,253
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	2,100
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0
Financing Receivable, Revolving	17,382
Loans and Leases Receivable, Net of Deferred Income	$ 33,005	$ 41,123
Weighted Average Risk Grade For Loans | Grade	9.00	9.00
Risk Grade Nine [Member] | Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net of Deferred Income		$ 362,656
Weighted Average Risk Grade For Loans | Grade		9.00
Risk Grade Ten [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 2,131
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	636
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	814
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	4,513
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	1,518
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	143
Financing Receivable, Revolving	21,207
Loans and Leases Receivable, Net of Deferred Income	$ 33,169	$ 59,137
Weighted Average Risk Grade For Loans | Grade	10.00	10.00
Risk Grade Ten [Member] | Commercial and Industrial Total Energy Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	456
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	226
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0
Financing Receivable, Revolving	0
Loans and Leases Receivable, Net of Deferred Income	$ 729	$ 1,773
Weighted Average Risk Grade For Loans | Grade	10.00	10.00
Risk Grade Ten [Member] | Commercial Real Estate Buildings Land And Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 33,233
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	14,484
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	11,364
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	42,672
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	29,990
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	6,012
Financing Receivable, Revolving	0
Loans and Leases Receivable, Net of Deferred Income	$ 137,755	$ 269,447
Weighted Average Risk Grade For Loans | Grade	10.00	10.00
Risk Grade Ten [Member] | Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 28,851
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	75
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0
Financing Receivable, Revolving	0
Loans and Leases Receivable, Net of Deferred Income	$ 28,926	$ 0
Weighted Average Risk Grade For Loans | Grade	10.00	10.00
Risk Grade Ten [Member] | Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net of Deferred Income		$ 269,447
Weighted Average Risk Grade For Loans | Grade		10.00
Risk Grade Eleven [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 35
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	3,984
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	6,444
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	4,332
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	1,391
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1,942
Financing Receivable, Revolving	8,188
Loans and Leases Receivable, Net of Deferred Income	$ 30,061	$ 31,518
Weighted Average Risk Grade For Loans | Grade	11.00	11.00
Risk Grade Eleven [Member] | Commercial and Industrial Total Energy Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 8,714
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	186
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	173
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	3,183
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	819
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	151
Financing Receivable, Revolving	0
Loans and Leases Receivable, Net of Deferred Income	$ 13,226	$ 16,594
Weighted Average Risk Grade For Loans | Grade	11.00	11.00
Risk Grade Eleven [Member] | Commercial Real Estate Buildings Land And Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 12,808
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	14,684
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	4,520
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	6,393
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	6,401
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	38,266
Financing Receivable, Revolving	2,993
Loans and Leases Receivable, Net of Deferred Income	$ 86,641	$ 91,140
Weighted Average Risk Grade For Loans | Grade	11.00	11.00
Risk Grade Eleven [Member] | Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	13,316
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0
Financing Receivable, Revolving	0
Loans and Leases Receivable, Net of Deferred Income	$ 13,316	$ 0
Weighted Average Risk Grade For Loans | Grade	11.00	11.00
Risk Grade Eleven [Member] | Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net of Deferred Income		$ 91,140
Weighted Average Risk Grade For Loans | Grade		11.00
Risk Grade Twelve [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	85
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	837
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	2,975
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	1,419
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	234
Financing Receivable, Revolving	467
Loans and Leases Receivable, Net of Deferred Income	$ 6,453	$ 12,535
Weighted Average Risk Grade For Loans | Grade	12.00	12.00
Risk Grade Twelve [Member] | Commercial and Industrial Total Energy Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 4,104
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	72
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	1,394
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	15
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0
Financing Receivable, Revolving	4,571
Loans and Leases Receivable, Net of Deferred Income	$ 10,459	$ 8,953
Weighted Average Risk Grade For Loans | Grade	12.00	12.00
Risk Grade Twelve [Member] | Commercial Real Estate Buildings Land And Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 613
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	2,082
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	223
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	275
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1,500
Financing Receivable, Revolving	0
Loans and Leases Receivable, Net of Deferred Income	$ 4,693	$ 15,097
Weighted Average Risk Grade For Loans | Grade	12.00	12.00
Risk Grade Twelve [Member] | Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0
Financing Receivable, Revolving	0
Loans and Leases Receivable, Net of Deferred Income	$ 0	$ 748
Weighted Average Risk Grade For Loans | Grade	12.00	12.00
Risk Grade Twelve [Member] | Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net of Deferred Income		$ 15,845
Weighted Average Risk Grade For Loans | Grade		12.00
Risk Grade Thirteen [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	228
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	270
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	20
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0
Financing Receivable, Revolving	0
Loans and Leases Receivable, Net of Deferred Income	$ 814	$ 10,047
Weighted Average Risk Grade For Loans | Grade	13.00	13.00
Risk Grade Thirteen [Member] | Commercial and Industrial Total Energy Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 1,050
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0
Financing Receivable, Revolving	3,175
Loans and Leases Receivable, Net of Deferred Income	$ 5,675	$ 5,480
Weighted Average Risk Grade For Loans | Grade	13.00	13.00
Risk Grade Thirteen [Member] | Commercial Real Estate Buildings Land And Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 470
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	326
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0
Financing Receivable, Revolving	0
Loans and Leases Receivable, Net of Deferred Income	$ 796	$ 200
Weighted Average Risk Grade For Loans | Grade	13.00	13.00
Risk Grade Thirteen [Member] | Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	0
Financing Receivable, Revolving	0
Loans and Leases Receivable, Net of Deferred Income	$ 0	$ 200
Weighted Average Risk Grade For Loans | Grade	13.00	13.00
Risk Grade Thirteen [Member] | Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and Leases Receivable, Net of Deferred Income		$ 400
Weighted Average Risk Grade For Loans | Grade		13.00
Revolving Credit Facility [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	6.25
Revolving Credit Facility [Member] | Commercial and Industrial Total Energy Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	5.40
Revolving Credit Facility [Member] | Commercial Real Estate Buildings Land And Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	7.26
Revolving Credit Facility [Member] | Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	6.36
Revolving Credit Facility [Member] | Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	6.63
Revolving Loans Converted to Term [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Revolving, Converted to Term Loan	$ 64,905
Weighted Average Risk Grade For Loans | Grade	7.57
Revolving Loans Converted to Term [Member] | Commercial and Industrial Total Energy Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Revolving, Converted to Term Loan	$ 46,958
Weighted Average Risk Grade For Loans | Grade	6.46
Revolving Loans Converted to Term [Member] | Commercial Real Estate Buildings Land And Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Revolving, Converted to Term Loan	$ 107,878
Weighted Average Risk Grade For Loans | Grade	6.45
Revolving Loans Converted to Term [Member] | Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Revolving, Converted to Term Loan	$ 4,414
Weighted Average Risk Grade For Loans | Grade	5.01
Revolving Loans Converted to Term [Member] | Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Revolving, Converted to Term Loan	$ 112,292
Weighted Average Risk Grade For Loans | Grade	6.39
Revolving Loans Converted to Term [Member] | Risk Grade One To Eight [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Revolving, Converted to Term Loan	$ 47,088
Revolving Loans Converted to Term [Member] | Risk Grade One To Eight [Member] | Commercial and Industrial Total Energy Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Revolving, Converted to Term Loan	45,123
Revolving Loans Converted to Term [Member] | Risk Grade One To Eight [Member] | Commercial Real Estate Buildings Land And Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Revolving, Converted to Term Loan	105,168
Revolving Loans Converted to Term [Member] | Risk Grade One To Eight [Member] | Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Revolving, Converted to Term Loan	4,414
Revolving Loans Converted to Term [Member] | Risk Grade Nine [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Revolving, Converted to Term Loan	11,133
Revolving Loans Converted to Term [Member] | Risk Grade Nine [Member] | Commercial and Industrial Total Energy Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Revolving, Converted to Term Loan	35
Revolving Loans Converted to Term [Member] | Risk Grade Nine [Member] | Commercial Real Estate Buildings Land And Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Revolving, Converted to Term Loan	2,134
Revolving Loans Converted to Term [Member] | Risk Grade Nine [Member] | Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Revolving, Converted to Term Loan	0
Revolving Loans Converted to Term [Member] | Risk Grade Ten [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Revolving, Converted to Term Loan	2,207
Revolving Loans Converted to Term [Member] | Risk Grade Ten [Member] | Commercial and Industrial Total Energy Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Revolving, Converted to Term Loan	47
Revolving Loans Converted to Term [Member] | Risk Grade Ten [Member] | Commercial Real Estate Buildings Land And Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Revolving, Converted to Term Loan	0
Revolving Loans Converted to Term [Member] | Risk Grade Ten [Member] | Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Revolving, Converted to Term Loan	0
Revolving Loans Converted to Term [Member] | Risk Grade Eleven [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Revolving, Converted to Term Loan	3,745
Revolving Loans Converted to Term [Member] | Risk Grade Eleven [Member] | Commercial and Industrial Total Energy Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Revolving, Converted to Term Loan	0
Revolving Loans Converted to Term [Member] | Risk Grade Eleven [Member] | Commercial Real Estate Buildings Land And Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Revolving, Converted to Term Loan	576
Revolving Loans Converted to Term [Member] | Risk Grade Eleven [Member] | Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Revolving, Converted to Term Loan	0
Revolving Loans Converted to Term [Member] | Risk Grade Twelve [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Revolving, Converted to Term Loan	436
Revolving Loans Converted to Term [Member] | Risk Grade Twelve [Member] | Commercial and Industrial Total Energy Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Revolving, Converted to Term Loan	303
Revolving Loans Converted to Term [Member] | Risk Grade Twelve [Member] | Commercial Real Estate Buildings Land And Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Revolving, Converted to Term Loan	0
Revolving Loans Converted to Term [Member] | Risk Grade Twelve [Member] | Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Revolving, Converted to Term Loan	0
Revolving Loans Converted to Term [Member] | Risk Grade Thirteen [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Revolving, Converted to Term Loan	296
Revolving Loans Converted to Term [Member] | Risk Grade Thirteen [Member] | Commercial and Industrial Total Energy Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Revolving, Converted to Term Loan	1,450
Revolving Loans Converted to Term [Member] | Risk Grade Thirteen [Member] | Commercial Real Estate Buildings Land And Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Revolving, Converted to Term Loan	0
Revolving Loans Converted to Term [Member] | Risk Grade Thirteen [Member] | Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Revolving, Converted to Term Loan	$ 0
2022 [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	6.44
2022 [Member] | Commercial and Industrial Total Energy Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	6.22
2022 [Member] | Commercial Real Estate Buildings Land And Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	7.11
2022 [Member] | Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	7.11
2022 [Member] | Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	7.11
2021 [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	7.05
2021 [Member] | Commercial and Industrial Total Energy Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	5.64
2021 [Member] | Commercial Real Estate Buildings Land And Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	7.19
2021 [Member] | Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	7.21
2021 [Member] | Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	7.20
2020 [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	6.04
2020 [Member] | Commercial and Industrial Total Energy Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	7.67
2020 [Member] | Commercial Real Estate Buildings Land And Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	7.27
2020 [Member] | Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	6.55
2020 [Member] | Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	7.17
2019 [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	6.66
2019 [Member] | Commercial and Industrial Total Energy Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	8.81
2019 [Member] | Commercial Real Estate Buildings Land And Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	7.20
2019 [Member] | Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	8.08
2019 [Member] | Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	7.24
2018 [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	6.92
2018 [Member] | Commercial and Industrial Total Energy Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	8.52
2018 [Member] | Commercial Real Estate Buildings Land And Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	7.35
2018 [Member] | Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	6.00
2018 [Member] | Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	7.35
Prior Years [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	5.73
Prior Years [Member] | Commercial and Industrial Total Energy Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	6.70
Prior Years [Member] | Commercial Real Estate Buildings Land And Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	6.90
Prior Years [Member] | Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	6.76
Prior Years [Member] | Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Weighted Average Risk Grade For Loans | Grade	6.90